I would say $12-14k with no motor. '10-11, higher mile, complete SS' are starting to get around that price now. I'm not sure how much value that SLP setup keeps, so thats probably on the low side.

The motor with some bad rings, etc. comes with the car. Nothing major broken. SLP TVS2300 is an easy $3k complete with SLP coil covers and extra pulley. Had a pm on it. And yes, a modified car is only worth more to someone who likes the way it has been setup.

I'm not a whizz-bang on engines. This was basically a result of melted cats? Were they stock? Should one consider hi-flows with a SC? I guess I'm in the camp to rebuild and keep it. Even if you don't go forged.

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"I don't want to belong to any club that would accept me as a member" - G. Marx

With as nice as the car is, and all the work you've already done to it, I'd rebuild the motor.

Have you disassembled the engine yet to determine the actual cause of the lower compression in those cylinders?
It just might turn out to be an easier fix than you might think?
Then judge what you'd do from then on.
Perhaps get a new short block and re-build with your parts if it turns out you have bad pistons/rings/bearings.
Perhaps the damage is in the heads/valve train.